Re: how to debug slow rbd block device

[Stefan Priebe - Profihost AG <s.priebe@xxxxxxxxxxxx>]

Am 23.05.2012 08:30, schrieb Josh Durgin:
> On 05/22/2012 11:18 PM, Stefan Priebe - Profihost AG wrote:
>> Hi,
>>
>>>> So try enabling RBD writeback caching — see http://marc.info
>>>> /?l=ceph-devel&m=133758599712768&w=2
>>>> will test tomorrow. Thanks.
>> Can we path this to the qemu-drive option?
> 
> Yup, see http://article.gmane.org/gmane.comp.file-systems.ceph.devel/6400
I'm sorry, i still don't get it where to pass rbd_cache_max_dirty, ...
can i add it just to the ceph.conf? Even with qemu 1.0?

Stefan
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